Timelines!

Looking for information on when the following events took place in our history:
1. 25 Pounders arrived?
2. 105mm C2 howitzers arrived?
3. 105mm C1 howitzers arrived?
4. 1951/1952 model deuce and a halfs arrived?
5. The home made deuce command post was constructed?
MLVWs arrived?
6. 5/4 Ton Command Posts arrived?
7. Refurbished 105mm C1 howitzers arrived? (They were camouflage painted for the first time)
8. Iltis arrived?
9. 105mm C3 howitzers arrived?
10. MLVWs were grounded for dustboot issues?
11. MLVWs were grounded for split rim issues?
12. Hewlett Packard 41Cs were introduced?
13. Eproms for the Hewlett Packard 41C was introduced?
14. Milipacs were introduced?
15. What other new vehicles/instruments did I miss?